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Welding and Cutting Apparatus The Bastian-Blessing Co. 240 E. Ontario Street, Chicago, 111. Welding and Cutting Equipment Welding is the modern way of making pipe joints, and this process is rapidly gaining the support of engineers and architects who recognize its superior qualities. With properly welded joints where threads are usually used the following results may be expected: 1. Increased efficiency in flow. 2. Increased tightness and leak-proofness of joint. 3. Rapid erection and easy alteration. 4. Less dead weight. ' 5. Decrease in first cost and in cost of upkeep. The most modern skyscrapers have welded piping throughout. A fund of information is available for the asking. Write and state your problems. Welding School Cutting Nero Opening Complete units for both welding, arid cutting of pipesmay be had for as low a price as $75.00 Our complete catalog will be sent on request. Less Expensive Covering 874 Welding In Branch Index to Modem Equipment American Society of Heating and Ventilating Engineers Guide, 1930 ACCESS PANELS (See Panels, Access) AIR MEASURING AND RE CORDING INSTRUMENTS Cochrane Corp. Thermal Units Co. Thermidaire Corp. L. J. Wing Mfg. Co. AIR CLEANING EQUIPMENT American Blower Corp. Bayley Blower Co.Bishop & Babcock Sales Co. Buffalo Forge Co. De Bothezat Impeller Co., Inc. Ellison Draft Gage Co. E. Vernon Hill Co. Reed Air Filter Co., Inc. Webster Tallmadge & Co,, Inc. BLOWERS, Pressure Bayley Blower Co. Buffalo Forge Co. Combustion Specialties Corp. Garden City Fan Co. Cooling 8e Air Conditioning Corp: Garden City Fan Co. Ilg Electric Ventilating Co. AIR MOISTENING APPA RATUS (See Humidifiers) * Ilg Electric Ventilating Co. Johnson Fan & Blower Co. New York Blower Co. Langenberg Mfg. Co. Maryland Air Conditioning Corp. AIR PURIFYING APPARATUS Midwest Mfg. Co. United States Ozone Co. B. F. Sturtevant Co. L. J. Wing Mfg, Co. National Air Filter Co. John J. Nesbitt, Inc. New York Blower Co. Niagara Blower Co. Parks-Cramer Co. Reed Air Filter Co., Inc. Skinner Bros. Mfg. Co. Strandwitz & Scott, Inc. B. F. Sturtevant Co. Unit Heater & Cooler Co. York Heating & VentilatingCorp. AIR RECEIVERS (Set Receivers, Air) AIR VALVES (See Valves, Air) AIR WASHERS (See Air Cleaning Equipment) AMMONIA COILS (S Coils, Ammonia) BLOWERS, Turbine American Blower Corp. Bayley Blower Co. Buffalo Forge Co. Garden City Fan Co. General Electric Co. New York Blower Co. B. F. Sturtevant Co. L. J. Wing Mfg. Co. BOILERCOMPOUNDS (See Com AIR COMPRESSORS (See Com pressors, Air) ASBESTOS PRODUCTS (See In sulation) pounds, Boiler) BOILER COVERING (See Cover AUTOMATIC SHUTTERS (See ing, Pipes and Surfaces) AIR COOLING AND DEHUMIDIFYING APPARATUS Shutters, A utomatic) BOILER FEEDERS (See Feeders. Aerofin Corp. Air-Way Electric Appliance Corp. American Blower Corp. Bayley Blower Co. Bishop & Babcock Sales Co. Buffalo Forge Co. Carrier Engineering Corp. BENDS, Pipe Boiler) v James B. Clow & Sons Crane Co. Grinnell Co., Inc. BOILER FEED PUMPS Pumps, Boiler Feed) BOILERS, Cast Iron BENDS, Return (SeePipe, Return. American Radiator Co. (See Cooling & Air Conditioning Corp. Bends) Bryant Heater & Mfg. Co. Ilg Electric Ventilating Co. Burnham Boiler Corp. ' Maryland Air Conditioning Corp. BLOWERS, Fan (See Fans, Sup-, Central Radiator Co. Herman Nelson Corp. ply and Exhaust) James B. Clow & Sons New York Blower Co. Molby Boiler Co., Inc. Niagara Blower Co. BLOWERS, Forced Draft L. J. Mueller Furnace Co. Parks-Cramer Co. Peerless Unit Ventilation Co., Inc. B. F. Sturtevant Co. Thermal Units Co. Whitlock Coil Pipe Co. York Heating&Ventilating Corp. York Ice Machinery Corp. American Blower Corp. Bayley Blower Co. Buffalo Forge Co. Combustion Specialties Corp. Garden City Fan Co. B. F. Sturtevant Co. L. J. Wing Mfg. Co. National Radiator Corp. Wm. H. Page Boiler Co. Pierce, Butler & Pierce Mfg. Corp. Pittsburg Water Heater Co. . Richardson & Boynton Co. Richmond Radiator Co. Spencer Heater Co. United States Radiator Corp. AIR ELIMINATORS BLOWERS, Heating and Venti Weii-McLain Co. Cochrane Corp. C. A. Dunham Co. Hoftman Specialty Co, Jas. P. Marsh & Co. McAleaf Mfg. Co. O-E Specialty Mfg. Co. Reed Air Filter Co., Inc. Sarco Co., Inc. Sterling Engineering Co. AIR FILTERS (See Air Cleaning Equipment) AIR HEATING SYSTEMS (See Healing Systems, Air) lating American Blower Corp. Bayley Blower Co. Bishop & Babcock Sales Co. Buckeye Blower Co. Buffalo Forge Co. Combustion Specialties Corp. Garden City Fan Co. . General Electric Co. W. F. HLrschman Co., Inc. Ilg Electric Ventilating Co. Johnson Fan & Blower Co. New York Blower Co. Niagara Blower Co. Skinner Bros. Mfg. Co.. Inc. B. F. Sturtevant Co. BOILERS, Combination, Gas, Coal, or Oil American Radiator Co. Brownell Co.Monitor Boiler Co. National Radiator Corp. Wm, H. Page Boiler Co. Richardson & Boynton Co. Richmond Radiator Co. Stanwood Corp.' . BOILERS, Down Draft Ames Iron Works Brownell Co. Erie City Iron Works Catalog Data of Manufacturers listed can be located by referring to pages 885 to I 875